JPS6132533B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a valve assembly for a reciprocating compressor consisting of a suction valve and a discharge valve, which comprises discs arranged one above the other and having a plurality of annular through passages. consisting of two valve members having a shape, both valve members being controlled by a flexible ring section connected via a radial web of the closure plate;
Furthermore, the closure plate is arranged in a recess between disc-shaped valve members and is fastened to a valve body at two clamping points.

BACKGROUND OF THE INVENTION The suction and discharge valves of particularly large compressors are constructed as ring valves with concentrically arranged annular passages. This ring valve is
It is easier to manufacture than valves with straight through passages. This is because it is suitable for the circular circumferential wall of the compressor cylinder and makes full use of the valve surface that can be used to pass the medium to be controlled. Furthermore, the assembly of so-called reed or plate valves with tongues or plates is relatively simple. This is because the valve does not need to have its own spring and no impact means are required. By firmly clamping one end of the tongue or plate, the valve operates relatively flexibly and without friction.

Previous attempts have been made to combine the advantages of ring valves with those of reed or plate valves. According to the known Austrian Patent No. 33 311, the closing plate of a ring valve, which consists of one or more concentric rings, is divided into a number of radial slits. 1 or maximum 2 rings divided by
It is fixed to the valve member at a certain point. In this way, a relatively long helically extending elastic laminate with a free end is produced, but the movement of this lamina is difficult to control and therefore cannot meet today's high demands. Can not.

Further known Federal Republic of Germany patent no. 1259158
In order to obtain the required degree of elasticity, the closure plate in that specification consists of a plurality of concentrically arranged annularly closed rings, which are joined by a single connecting web extending in the diametrical direction of the plate. are connected to each other by. A closure plate constructed in this way can be clamped to the valve body at a central location of the connecting web along the plate diameter on the underside of the curved valve seat, or alternatively only at one end location. It is tightened to the edge of the valve body. In such a configuration, when the valve is opened,
Near the tensioning point, the closing plate is hardly lifted off the valve seat, so that the open flow cross section is correspondingly small.

Yet another known configuration is disclosed in German Patent Application No. 2648682 (Japanese Patent Publication No. 37349/1982). In this case, a closing plate is provided which consists of a plurality of rings or ring sections connected to each other by radial webs, each ring or ring section being divided by a radial slit, and is clamped to the valve body at two clamping points in the completely closed ring. A complete ring and a ring section of the closure plate cooperate with the valve seat of the circular valve body. In the case of closure plates of such known construction, the suction and discharge valves of the compressor must each be constructed as separate, individual valves;
Alternatively, the closing plate must be constructed such that one half rests on the valve seat of the suction valve and the other half rests on the valve seat of the discharge valve. When the suction valve and the discharge valve are formed as a combination valve in this way, the valve members arranged above and below are arranged such that the valve member located above uses the left half as a valve holder, for example.
and the right half is formed as a valve body with a valve seat, and the valve member located below is formed, for example, with the left half as a valve body with a valve seat and the right half as a valve receiver. It must be configured as follows. In short, since the closing plate lies in one plane, the valve member must be provided with a recess in the half of the side which is formed as a valve seat to ensure the stroke movement of the ring section. Such an arrangement complicates the construction of the valve member, and it is also difficult to obtain a sufficient sealing effect in the central region of the closing plate, which forms the boundary between the suction chamber and the discharge chamber.

Problem of the Invention An object of the present invention is to ensure the tightness and sealing of the closing plate even when the suction valve and the discharge valve are configured as a combination valve, even though the valve member has a simple configuration. The purpose of the present invention is to make it possible to control the concentrically arranged annular passages of the ring valve in a flexible manner like a reed valve.

Means for Solving the Problems The measures taken to solve the above-mentioned problems are that two divided closing plates are provided, and the closing plates extend over an angle of approximately 180 degrees. and a ring section in each case, the cylinder section being continuous between the two tensioning points, and a separating disk of sealing material being arranged between the two valve members; The separating disc has a recess in which the closing plate is received.

Effect The closure plate is divided into two parts, such that the left-hand half of one valve member covers the valve seat, while the right-hand half leaves the through passage open, whereas the other half covers the valve seat. Each closure plate can be clamped to the valve member so as to cover the valve seat in the right half of the valve member and leave the passageway open in the left half of the valve member.

Furthermore, each closure plate has a ring section extending approximately 180 degrees between two tensioning points, such that the ring section is tensioned at one end and at the other end. It acts like a reed valve with freely movable tongues.

Effects of the Invention The advantage obtained by the invention is that each closing plate can be clamped to the valve member with its opposite halves, so that one half serves as the valve body and the other half serves as the valve member. Both the upper and lower valve members formed as valve receivers can be simply constructed as flat plates. Furthermore, the closure plate of the invention can act flexibly and gently, and no special seals are required at the junction of the suction and discharge chambers of the closure plate.

Embodiment The properties, in particular the elasticity, of the closure plate according to the invention can be adapted to the respective requirements.
For example, in the case of relatively high stresses, an advantageous embodiment provides for the ring sections of the closure plate to be connected to one another at least in one place, for example at the ends, by an additional web.
In short, by selecting the number and arrangement of the connecting webs, different properties of the closure plate can be selected.

Furthermore, for tightening the closing plate, it is advantageous if the ring section of the closing plate that is continuous between the tightening points projects beyond the remaining ring sections in the circumferential direction.

EXAMPLE A closure plate is designated with the reference numeral 1. The closure plate 1 is in all embodiments approximately semicircular in shape and consists of concentrically arranged ring sections, of which the outermost ring section 2 has two tension points. 3, and the tightening point is connected to ring section 2 as an opening.
shown at the end. The remaining ring section 4 is connected to the ring section 2 via a radial web 5.

According to FIG. 1, the ring section 4 is connected to the ring section 2 by three radial webs, one of these webs being located centrally between the two tensioning points 3. The two remaining webs 5 each connect only the outer three ring sections to each other. The ring sections 4 have tongue-shaped free ends which can be moved within a defined range independently of one another.
The closure plate of FIG. 1 is therefore distinguished by a high internal elasticity. In the case of the embodiment according to FIG. 2, ring section 2 and the remaining ring section 4
There is only one web 5 between and which is widened near the ring section 2. In contrast, however, the ends of the remaining ring sections 4 are connected to one another by additional webs 6. This increases the stiffness of the closure plate,
However, the inner ring section 4 is still more elastic than the tightened ring section 2. In the variant embodiment shown in FIG. 3, three webs 5 are provided and, in addition, the ends of the ring sections 4 are also connected to one another by webs 6.

In the embodiment according to FIGS. 1 and 3 for tensioning the closing plate 1, the end of the ring section 2 projects in the circumferential direction beyond the remaining section 4, so that the tensioning point 3 is Advantageously grabbed by the hand.
In contrast, in FIG. 2, the ends of the ring section 2 are only widened. The closing plate can be fastened to the valve member in various ways. The ring section 2 is clamped firmly between the valve body with the valve seat and the valve carrier in the area of the tensioning point 3 or, if appropriate, on the underside of the intermediate part as a spacer. It's included. Moreover, a screw is provided at the tensioning point, which screw securely tightens the end of the ring section 2 against the associated valve body.

In the case of the valves of FIGS. 4 and 5, they are constructed as a combined valve assembly, the left-hand half of which is designed as a suction valve and the right-hand half as a discharge valve. . In FIG. 4, two disc-shaped valve members 7, 8 are provided, which are arranged one above the other with a separating disc 9 interposed therebetween. Both valve members 7, 8 are preferably of identical design and consist of flat discs which are provided with passages 10. The separating disc 9 preferably consists of a compressible plastic material, such as a sealing material, and the two halves of the valve member of the disc material each have a recess in which a closing plate 1 is arranged in each case. Sections 11 and 12 are formed. The passageway 10 is designed in the form of a kidney and on concentric circles, as is customary in ring valves.

In the exemplary embodiment, the closing plate 1 is clamped between the separating disk 9 and the valve element 7 or between the separating disk 9 and the valve element 8, respectively. As can be seen in FIG. 5, the left half of the closure plate 1 is shown in broken lines. In this case, the tensioning point 3 is located in the area of the separating disk 9 and a centering pin is inserted into this tensioning point. Moreover, the free ends of the outer ring sections 2 in the recesses 11 and 12 are each fastened to the associated valve element 7, 8 by a screw. The closing plates 1 of the suction and discharge valves can be arranged at any desired distance from each other. In short, the through passages 10 do not need to be located on absolutely concentric circles. The passageways can be offset outwardly relative to each other, for example to the left and to the right in FIG. 5, resulting in an oval arrangement.

In FIG. 5 a resilient pin is indicated at 13 and passes through the holes in the valve members 7, 8 and the separating disc 9, so that the valve member is fixed before being assembled into the valve. There is. Furthermore, a screw hole 14 is provided, by means of which a relatively large valve is connected in the central region to the intermediate wall of the cylinder head (not shown), so that leakage does not occur in this case. I can't.

[Brief explanation of the drawing]

1, 2 and 3 are plan views showing different embodiments of the closure plate according to the invention, and FIG.
The figure shows a valve assembly for a compressor equipped with a closing plate according to the present invention, and is a sectional view taken along the line -- in FIG. 5, and FIG. 5 is a plan view of the valve assembly shown in FIG. 4. 1...Closing plate, 2...Ring section, 3...
... Tightening point, 4 ... Ring section, 5, 6 ... Web, 7, 8 ... Valve member, 9 ... Separating disk, 10 ...
...Through passage, 11, 12... Notch, 13... Pin, 14... Screw hole.

Claims (1)

[Scope of Claims] 1. A valve assembly for a reciprocating compressor consisting of a suction valve and a discharge valve, which is composed of two disc-shaped valve members arranged one above the other and having a plurality of annular through passages. wherein both valve members are controlled by a flexible ring section connected via a radial web of a closure plate, and wherein the closure plate includes a cut between the disc-shaped valve members. In the version arranged in the recess and fastened to a valve member at two tension points, two divided closing plates 1 are provided, which cover approximately 180 degrees. , and each has a ring section 2 which is continuous between the two tensioning points 3 and between the two valve members 7, 8. A separating disk 9 made of a sealing material is disposed in the notch portions 11 and 1.
Valve set for a reciprocating compressor, characterized in that it has a recessed part 2, in which said closing plate 1 is received. 2. Valve assembly according to claim 1, wherein the ring sections 4 of the closing plate 1 are connected to one another in at least one place by an additional web 6. 3. Valve assembly according to claim 1, in which the continuous ring section 2 of the closing plate 1 between the tensioning points 3 projects beyond the remaining ring section 4 in the circumferential direction. .